Finally got hold of a copy of "The Pinball Compendium - 1930s to 1960s" by Michael Shalhoub.
After a quick read, i can certainly see why lots of collectors like these machines so much.
The artwork on these old games is absolutely beautiful!
I never really thought I would have much interest in this era of machines but now would love to add one (or two), to my collection one day.
For some of our newer members who may not have seen these books before, I highly recommend them.